Smoke-siphon.



N0- 892,527. PATENTED JULY 7, 1908. R. W. KILPATRIGK.

SMOKE SIPHON.

APPLICATION FILED JUNE 2, 190a. RENEWED DEC. 5, 1907.

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WITNESSES INVENTOR 1 V QM A TTOHNEY.

R. W. KILPATRICK.

SMOKE SIPHON.

APYLICATION FILED JUNE 2,1906. RENEWED DEO.6,1907.

PATENTED JULY 7, 1908.

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No. 892,527. I PATENTED JULY 7, 190a.

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SMOKE SIPHON.

APPLICATION FILED JUNE 2, 190a. RENEWED DEC. 5, 1907.

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No. 892,527. PATENTED JULY 7, 1908. R. W. KILPATRIOK.

SMOKE SIPHON. APPLICATION TILED JUNE 2, 1906. RENEWED DBO. 5, 1907.

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UNITED STATES PATENT OFFICE.

ROBERT W. KILPATRICK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-FIFTH TO LOUIS VON GRAEVE AND FOUR-FIFTHS TO IRA H. KARPER, OF PHILADELPHIA, PENNSYLVANIA.

SMOKE-SIPHON.

Application filed June 2, 1906, Serial No. 319,834.

To all whom it may concern:

Be it known that I, ROBERT WV. KIL- PATRICK, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Smoke- Siphon, of which the following is a specilication.

This invention relates to improvements in means for intercepting, consuming and returning products of deficient combustion from furnaces. Its objects are, primarily, to prevent the colored, noxious gases, ordinarily termed smoke from issuing into the atmos here, conserving a large proportion of t e heat elements therein, and, secondly, to retard the-too rapid escape of heat prior to the full accomplishment of its purpose, both objects tending thereby to reduce the fuel consumption. These andother objects are attained by the novel construction and combinations of parts hereinafter described and shown in accompanying drawings, in which z- Figure 1, is a View showing a common form of boiler and a longitudinal section of its furnace and setting, including the intake. Fig. 2, is a horizontal sectional View of the furnace, secondary combustion chamber, intake and its appurtenances, showing their relative position. Fig. 3, is a vertical cross section ofthe furnace, taken at a point indicated by the line aa of Fig. 2. Fig. 4, is a similar section of the furnace, taken at a point indicated by the line bb of Fig. 2. Fig. 5, is a general plan View of the entire apparatus, partially in section. Fig. 6, is a View showing another form of boiler construction, the furnace walls and intakes being in section. Fig. 7, is a side elevation of the furnace wall, showing the ap lication of the intake thereto. Fig. 8, is a p an View of the same.

Perfect combustion of carbonaceous fuels produces chemical changes in their elements, resulting in the evolution of a high degree of heat during which time carbonic acid gas is formed, escaping ordinarily through suitable channels into the atmosphere.

If oxygen be supplied in greater quantities than necessary for the support of such combustion, flame issues from the fuel and is carried along with the carbonic acid gas Specification of Letters Patent.

Patented July 7, 1908.

Renewed December 5, 1967. Serial No. 405,249.

until the carbonaceous particles are consumed or educted into the atmosphere. The draft thus created is often sufficient to raise and convey entrained therein, minute part1- cles of the fuel, which, with the burning hydrogen gas extracted from the fuel, and together with other elements and impuritles contained therein, such as sulfur and the like, give color and odor to the educted smoke, which contaminating the atmosphere, is properly regarded as a nuisance.

Incandescent fuel emanates no odor or color, but a fuel bed can not long remain quiescent, as the heat supplying qualities become exhausted, fresh supplies must constantly be added and the draft oxygen supplymust be regulated in order to keep up a maximum heat giving temperature. Hence, with the most careful systems of stoking, perfect results are not attainable, as some of the unconsumed elements escape past the point where they can ordinarily be consumed. In order to overcome this (llfllculty it is necessary not only to intercept these gases and carbonaceous atoms, but cause them to come into intimate contact with a consuming heat and thence return them to a place where their heat may be beneficially employed. To accomplish this, I provide an intake 1, made of refractory material, such as fire-bricks are composed of, having relatively heavy, thick walls and capable of withstanding an incandescent heat uninterruptedly and without injury. This intake is invariably placed as closely as the nature of the furnace will permit to the "fire box, usually at the rear and immediately adj acent to the bridge wall. Here it is disposed so that the heat and flame passing over the bridge wall impinges within the rectangular bell-mouthed opening, the same being presented angularly to obtain this effect, is heated thereby nearly to the temperature of the bridge wall, and by reason of the heavy refractory material of which it is composed, retains this heat.

The general shape of the intake is that of a flattened cone, the walls converging rearwardly, and supported by any convenient means, as upon rails, set in the brick work of the furnace, or upon piers erected for that pur ose.

e intake is made to nearly fill the ehamversely across her in which it is located, only sufficient! space being left to provide for the passage of consumed gases over its top and at the sides.

Leading from the rear of the intake is a neck 2, extending to one of the sides and through the brick work of the furnace, where it connects with a bend or elbow 3, having at its other opening a section of tube 4, disposed parallel with, and in close proximity to the furnace wall along which it extends to a point slightly above the normal height of the fuel on the grate surface and from one fourth to one third of the distance between the bridge wall and fire door openings. Here it connects with another elbow 5, having in its opposite opening a short length of tube 6, terminating coincidently with the interior wall of the fire box and gradually decreasing in internal diameter from the elbow to the outlet.

Within either or both the elbows 3 and 5, are provisions for admitting a jet 7 of steam or compressed air, and so arranged with reference to the tubing as to materially aid in forminga current within it, in the direction of the fire box, after the manner of a siphon oret injector.

In operation, the fire being started and this intake heated, as before explained, all smoke and carbonaceous particles entering the intake are brought to combustion and, with the hot gases, are drawn through the piping leading therefrom and forced trans the fire surface, presenting, in a jet form, the collected matter at an intense heat to the rising gases and those flowing from the front part of the fire-box. The mechanical action of this et is to retard the unconsumed gases and carbonaceous particles, while the high temperature causes them to be largely consumed in the presence of the oxygen passing upward through the'fuel bed, from properly proportioned air openings, into the ash pit.

lVith some forms of furnaces, or their ap plications to special conditions, it is desirable to make use of a secondary intake, the same being so arranged as to intercept any smoke which may have escaped the primary intake, and return it in connection with the volume therefrom. In such cases the rear intake is usually inverted and positioned near to the stack opening or even therein, as at 8; leading outwardly is a neck 9, elbow 10 and suit able tube, 11, connecting with a Y placed in the tube 4, the same having been pre viously described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

In a steam boiler furnace having the usual fire-box, grate and bridgewall, the combination of a smoke intake situated within the Zone of combustion and within the path of the products of combustion, said smoke intake having comparatively thick walls formed of refractory material adapted to be raised to a fuel ignition temperature and to be maintained at such temperature during the period of combustion, and a duct leading from said smoke intake and discharging transversely of the fire-box above the grate and near the bridge-wall of the furnace, and means for causing the return of the smoke through said duct.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT W. KILPATRICK.

Witnesses:

Lou s VON GRAEVE, WALTER S. BOWLING 

